查询词典 voltage changer

In this design, the calculation of load is very important, according to the result of the calculation, can choose the section of line, the model of the voltage changer, the relaying of voltage and current and so on.

在这次设计中，负荷计算是非常重要的，根据计算结果，可以选择供电系统中线路的导线截面、变压器的型号、电压和电流互感器等主要电气设备的型号。

According to the learning of the Power l Supplying Projet, the primary design is about the 10kv switch-substation, according to the load and demand of the supply electric system of factory, the design of the gather reduction voltage substation and distribution system, and the checking of the main electric apparatus, the protection and adjusting and the lightning protection of the main voltage changer and line.

开闭所继电保护设计*。本文通过对供电工程的学习，主要是针对10kV 开闭所进行初步设计。根据所提供的负荷及对供配电系统的要求，对主要设备进行选型校验，对主变压器、线路进行保护整定计算，对主、变线路进行防雷保护等。

Before welding, based on the parameters which are set by custom the control software determine motion index points of different welding stages; in the welding process, the control software collect the motion of the moving bench, the current of voltage changer , the voltage of welding, and enter the corresponding welding stages based on the different motion index points.

焊接主电源部分在变压器初级使用晶闸管组进行调压，经过变压器降压和整流管三相全波整流，输出平稳的直流电压。

When the cables use in alternating current system, rated voltage of cables should be at least equal the rated voltage of the system; When the cables use in direct current system,rated voltage should be not greater than 1.5 times of the rated voltage of the cables .

当电缆使用于交流系统时，电缆的额定电压至少应等于该系统的额定电压；当电缆使用地直流系统时，该系统的额定电压应不大于电缆额定电压的1.5倍。

The invention relates to an ESD protector which comprises the first well and the second well inside the semi-conductor liner, while a separating area is between them; the N pour area is inside the second well, to couple the first node; the NLDD area is between the N pour areas, and annularly poured under the NLDD areas; when the voltage of first node is higher than the breakdown voltage, the current discharge path is limited by the NLDD area and annular pour; said breakdown voltage is lower than the breakdown voltage of oxide of logic gate.

本发明提供了ESD保护技术。一种ESD保护器件包括设置在半导体衬底中的第一阱区和第二阱区，并且隔离区位于中间。N 注入区被设置在第二阱区中，并且在第一节点处耦合在一起。NLDD区被设置在N 注入区之间，并且环形注入位于每个NLDD区之下。当第一节点的电压超过击穿电压时，电流放电路径由对应的NLDD区和环形注入所限定。在一个具体实施例中，所述击穿电压小于逻辑门氧化物的击穿电压。

Capacitor voltage transformer decreases the voltage with capacitance bleeder, and complete the work that convert high voltage to low voltage with electromagnetic unit.

随着电压等级的提高，电容分压器节数增多，受运行条件的影响也加大，选型对保证1000kVCVT的正常工作至关重要。

Solar controller series is the intelligent control of micro-computer chip products, it can real-time monitoring of solar cell voltage and battery voltage, when the charging voltage reaches the rated voltage automatically transferred to the pulse charging, the battery automatically stops charging after saturation, the effective prevention of Charge-off and less filling.

串联型太阳能控制器，是微电脑芯片控制的智能产品，它能实时监控太阳能电池的电压和蓄电池的电压，当充电电压达到额定电压时，自动转入脉动充电，蓄电池饱和后自动停止充电，有效防止过充和欠充。

The invention relates to an amplifier circuit containing a high-frequency transistor (1) and having a circuit (2) for adjusting the operating point, which provides a base current for the high-frequency transistor (1) according to the voltage released at a resistor (3) which is connected in the collector ring of the high-frequency transistor (1). The circuit (2) has a differentiating unit (20), fed by the supply voltage, which compares the voltage released at the resistor (3) with a reference voltage.

带有高频晶体管(1)的放大器电路具有一个用于工作点调整的电路(2)，其依赖于在连接在高频晶体管(1)的集电极电路中的电阻(3)上下降的电压为高频晶体管(1)提供基极电流，电路(2)具有一个由供电电压馈电的差分节(20)，其把在电阻(3)上下降的电压与基准电压比较。

The light source detecter makes used of the variation of the separated voltage by the resistivity of photosensitive resistance input to the singlechip. If the voltage higher than a worth, the singlechip will regard it as high voltage state, it means that the light source has been detected. Otherwise the low voltage state means the light source has not been detected.

光源探测是利用光敏电阻阻值分压的变化向单片机输入，电压大于某值时，单片机认为是高电平，即表示该路探测器感应到光源，否则为低电平，即表示探测器没有感应到光源，如此即可由两路信号判断光源的方向。

Protection schemes based on the zero sequence fundamental voltage and the third harmonic voltage and the injection voltage are presented in this paper, and based on which, the factors which affects the protection schemes based on the zero sequence fundamental voltage and the relevant measures is presented.

本文在对基波零序电压型定子接地保护、三次谐波电压型定子接地保护和外加电源式定子接地保护各种方案的构成原理及其优缺点进行分析的基础上，详细分析了影响基波零序电压型定子接地保护的各种因素，并提出了相应措施。

Fewer than 200 have been flown back from Lampedusa.

只有不到二百人从兰佩杜萨被遣返。

That if the process can produce much liquid phase during the sintering, and which can become into completely-crystal needle-shap or aborization or bar-shap calcium ferrite instead of glass in the cooling process; if the magnetite is interweaved by the caking into the melting corrosion structure, the granular structure or the eutectic structure instead of exiling in the massive isolation; if the mount of the poreis is little, and uniformitly distributing; if the grain is little; if the organizational structure is symmetrical, all of which can improve the quality of the sintering.

另外还归纳出有利于强度提高的工艺参数和操作制度。分析工业试验和水钢现行生产的矿物组成、结构表明，水钢烧结矿以他形晶磁铁矿为主，铁酸钙为主要的粘结相，多形成熔蚀结构、粒状结构和共晶结构，强度较高；而在台车边缘和表层，由于存在较严重边缘效应和点火温度较低，使该区域的烧结矿组织结构疏松，局部呈蜂窝状或薄壁大孔状，铁酸钙较少而硅酸二钙和玻璃质较多，形成骸晶状结构和磁铁矿连晶，强度较低，致使返矿升高。